BHO – Browser Helper Object
Some programs overview
BHO – Browser Helper Object
BHO (alternative names Browser Helper Object, Browser Plugin, Browser Bar, IE Bar, OE Bar, etc.) is the extension of browser or E-mail made in a form of additional control panel. BHO got several dangerous traits:
-BHOs are not the system processes as they work in Browser context and can?t be detected by the task dispatcher;
-BHOs run together with the browser and control the user?s Internet sessions for they are meant to do it;
-BHOs exchange with the network by API browser integration so most FireWalls consider it to be computer controlled. Many spyware BHOs transmit the information after the users? request at the level of useful traffic;
-BHOs malfunctions may make the browser operations unstable and cause its malfunctions which are hardly diagnosed.
Trojan ? Trojan software
Trojan software acts against the user by collecting and transmitting the confidential data (Trojan-Spy) or performing lots of unsanctioned or destructive actions. Trojans are the close Spyware relatives with the exception that Spyware programs usually don?t perform destructive actions or transmit the confidential info. Though classification of any program by this or the other category is really debatable for one antivirus company may consider the module to be the Adware, the second one ? to be The Trojan and the third one ? to ignore.
Hijacker
Is a software that performs in users? systems specific operations to meet the developers? tasks. Most antivirus developers classify The Hijacker as Trojan for it resets the browser, E-mail and other programs parameters without the users? compliance. Often, The Hijacker is used to reset:
- the starting page which is switched to the developers? page;
- the browser search system setting which leads to every time access to developers? page by clicking ?Search?;
- the protocols prefixes;
- the browser?s protection levels and settings;
-the Windows errors reaction (may access the developers web-page instead of showing 404)
-address list modification (?Preferences?)
Most of times you will see The Hijacker operating as Trojan, Dialer or Adware/Spyware.
Backdoor ? hidden utility for remote control and administration
Backdoors can be defined by following categories:
-Backdoor built by Client – Server. This one comprises to separate programs one of them is installed to user?s PC and the other one ? to the criminal?s PC. Sometimes it might have the settings module.
-Backdoor for remote control by telnet, web or IRC server. This one does not demand the client software and may exchange data directly through the IRC server.
As a rule, Backdoor allows to copy files at the infected PC or to transmit the files to it. At the same time it allows to gain remote register access and perform various system operations (PC reload, password modification, etc.). In fact, it provides the criminals to a control over your computer and you need to be aware that many modern network or mailing worms either have Backdoor-component or install it after the PC infection.
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